It must suck to be cats and birds

I sometimes wonder what it is about cats and birds that crazy people are drawn to. Whenever you hear about a crazy person and they have pets it's either a bunch of cats or birds. We all know about cat ladies, women who have ten, twenty, thirty cats, they think of them as their children etc. but birds seem to come with the crazy too. Look at Heidi Fleiss on this season of Celebrity Rehab, she lives in the middle of Death Valley with somewhere around forty birds, Mike Tyson has a pigeon coop and talks about how they are his only real friends. A bird is strange animal to have as a pet, have you ever heard a pet bird making noise and it was a sound that you enjoyed? Every time I have been in a house that has a bird the sound of that bird makes me crazy, maybe it is the birds that make the people crazy. Whatever the situation, these are two pets that are consistently paired with crazy people, you will occasionally hear of the crazy person that has a pet lion, tiger, boa constrictor, or wolf, but not on a regular basis. Time and time again birds and cats come with crazy people. I really want to know what it is about these animals that draw the crazies to them.